A run of oppressive heat is currently impacting NSW, with some towns in the state expected to see the warmest run of November days in 15 years.
Weatherzone meteorologist Ashleigh Madden says a blocking high pressure system centred near New Zealand is directing warm northerly winds over eastern NSW which is providing a run of warm days and nights.
The hottest day of the run should be today, ahead of thunderstorm activity and cloud cover forecast tomorrow.
Rain is forecast to bring some relief later in the week with the Bureau of Meteorology forecasting moderate falls in the region this Friday and Saturday.